<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="static/css/chater12-1.css">
    <title>第十二章</title>
    <!-- 设置浏览器的视觉宽度和屏幕宽度一致,并且缩放为100%-->
    <meta name="viewport" content="width=device-width,initial-scale=1" >
</head>
<body>
    <div class="page">
        <div class="main">
            main content
        </div>
        <div class="sideBar">
            sideBar content
        </div>
        <div class="other-content">
            other content
        </div>
        <p>
            hello world
        </p>
    </div>
</body>
</html>